Limits of stable fluidization regimes in vessel with inclined gas distributor grid

Abstract

The uniformity of gas distribution, as one of the components of back-mixing, affects the driving force of mass transfer and reaction processes in commercial-size vessels. This paper examines the gas distribution in a rectangular-section vessel with an inclined grid; confirms that the angle of inclination of the grid, even a small angle, must be taken into account in calculating the critical fluidization velocity; emphasizes that for large vessels, the accuracy of fabrication and installation of the gas distributor grid is extremely important; and points out that different parts of the grid should be identical in resistance (e.g, the grid openings should be identical in diameter, and the edges should all be finished identically).